/Engine/Source/Editor/LevelEditor/Public/LevelEditor.h
Return the settings (containing the outliner filters) used to create the level editor's outliners
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FLevelEditorOutlinerSettings](API\Editor\LevelEditor\FLevelEditorOutlinerSettings) > GetLevelEditorOutlinerSettings() const